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REVENUE RECOGNITION - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation Of Revenue [Line Items] |  |
Backlog associated with committed purchase orders from customers | $ 19.4 |
Revenue from Contracts with Customers - ASU No. 2014-09 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of revenue recorded from sales of materials | 98.00% | 98.00%
Revenue from Contracts with Customers - ASU No. 2014-09 [Member] | Adesis, Inc. [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Percentage of revenue recorded from provision of services | 2.00% | 2.00%

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- Details
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